113 lines
4.1 KiB
C++
113 lines
4.1 KiB
C++
// ----------------------------------------------------------------------------
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// - Open3D: www.open3d.org -
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// ----------------------------------------------------------------------------
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// Copyright (c) 2018-2023 www.open3d.org
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// SPDX-License-Identifier: MIT
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// ----------------------------------------------------------------------------
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// Altered from Filament's ImGuiHelper.cpp
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// Filament code is from somewhere close to v1.4.3 and is:
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/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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// 4068: Filament has some clang-specific vectorizing pragma's that MSVC flags
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// 4146: PixelBufferDescriptor assert unsigned is positive before subtracting
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// but MSVC can't figure that out.
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// 4293: Filament's utils/algorithm.h utils::details::clz() does strange
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// things with MSVC. Somehow sizeof(unsigned int) > 4, but its size is
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// 32 so that x >> 32 gives a warning. (Or maybe the compiler can't
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// determine the if statement does not run.)
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#ifdef _MSC_VER
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#pragma warning(push)
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#pragma warning(disable : 4068 4146 4293)
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#endif // _MSC_VER
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#include <filament/Engine.h>
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#include <filament/IndexBuffer.h>
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#include <filament/Material.h>
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#include <filament/MaterialInstance.h>
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#include <filament/Texture.h>
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#include <filament/VertexBuffer.h>
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#include <filament/View.h>
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif // _MSC_VER
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#include <cstddef> // <filament/Engine> recursive includes needs this, std::size_t especially
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#include <memory>
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struct ImDrawData;
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namespace open3d {
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namespace visualization {
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namespace rendering {
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class FilamentRenderer;
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}
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} // namespace visualization
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namespace visualization {
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namespace gui {
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struct Size;
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class Window;
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// Translates ImGui's draw commands into Filament primitives, textures, vertex
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// buffers, etc. Creates a UI-specific Scene object and populates it with a
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// Renderable. Does not handle event processing; clients can simply call
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// ImGui::GetIO() directly and set the mouse state.
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class ImguiFilamentBridge {
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public:
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ImguiFilamentBridge(visualization::rendering::FilamentRenderer* renderer,
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const Size& window_size);
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~ImguiFilamentBridge();
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// Helper method called after resolving fontPath; public so fonts can be
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// added by caller. Requires the appropriate ImGuiContext to be current
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void CreateAtlasTextureAlpha8(unsigned char* pixels,
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int width,
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int height,
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int bytes_per_px);
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// This populates the Filament View. Clients are responsible for
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// rendering the View. This should be called on every frame, regardless of
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// whether the Renderer wants to skip or not.
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void Update(ImDrawData* imguiData);
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void OnWindowResized(const Window& window);
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private:
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void CreateBuffers(size_t num_required_buffers);
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void PopulateVertexData(size_t buffer_index,
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size_t vb_size_in_bytes,
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void* vb_data,
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size_t ib_size_in_bytes,
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void* ib_data);
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void CreateVertexBuffer(size_t buffer_index, size_t capacity);
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void CreateIndexBuffer(size_t buffer_index, size_t capacity);
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void SyncThreads();
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private:
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struct Impl;
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std::unique_ptr<Impl> impl_;
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};
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} // namespace gui
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} // namespace visualization
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} // namespace open3d
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